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#import "NSColor+MGLAdditions.h"
@implementation NSColor (MGLAdditions)
- (mbgl::Color)mgl_color {
CGFloat r, g, b, a;
// The Mapbox Style Specification does not specify a color space, but it is
// assumed to be sRGB for consistency with CSS.
NSColor *srgbColor = self;
if ([NSColor redColor].colorSpaceName == NSCalibratedRGBColorSpace) {
srgbColor = [srgbColor colorUsingColorSpaceName:NSCalibratedRGBColorSpace];
} else {
srgbColor = [srgbColor colorUsingColorSpace:[NSColorSpace sRGBColorSpace]];
}
[srgbColor getRed:&r green:&g blue:&b alpha:&a];
return { (float)r, (float)g, (float)b, (float)a };
}
+ (NSColor *)mgl_colorWithColor:(mbgl::Color)color {
// macOS 10.12 Sierra and below uses calibrated RGB by default.
if ([NSColor redColor].colorSpaceName == NSCalibratedRGBColorSpace) {
return [NSColor colorWithCalibratedRed:color.r green:color.g blue:color.b alpha:color.a];
} else {
return [NSColor colorWithRed:color.r green:color.g blue:color.b alpha:color.a];
}
}
- (mbgl::style::PropertyValue<mbgl::Color>)mgl_colorPropertyValue {
mbgl::Color color = self.mgl_color;
return {{ color.r, color.g, color.b, color.a }};
}
@end
@implementation NSExpression (MGLColorAdditions)
+ (NSExpression *)mgl_expressionForRGBComponents:(NSArray<NSExpression *> *)components {
if (NSColor *color = [self mgl_colorWithComponentExpressions:components]) {
return [NSExpression expressionForConstantValue:color];
}
NSExpression *color = [NSExpression expressionForConstantValue:[NSColor class]];
NSExpression *alpha = [NSExpression expressionForConstantValue:@1.0];
return [NSExpression expressionForFunction:color
selectorName:@"colorWithRed:green:blue:alpha:"
arguments:[components arrayByAddingObject:alpha]];
}
+ (NSExpression *)mgl_expressionForRGBAComponents:(NSArray<NSExpression *> *)components {
if (NSColor *color = [self mgl_colorWithComponentExpressions:components]) {
return [NSExpression expressionForConstantValue:color];
}
NSExpression *color = [NSExpression expressionForConstantValue:[NSColor class]];
return [NSExpression expressionForFunction:color
selectorName:@"colorWithRed:green:blue:alpha:"
arguments:components];
}
/**
Returns a color object corresponding to the given component expressions.
*/
+ (NSColor *)mgl_colorWithComponentExpressions:(NSArray<NSExpression *> *)componentExpressions {
// Map the component expressions to constant components. If any component is
// a non-constant expression, the components cannot be converted into a
// constant color value.
std::vector<CGFloat> components;
for (NSExpression *componentExpression in componentExpressions) {
if (componentExpression.expressionType != NSConstantValueExpressionType) {
return nil;
}
NSNumber *component = (NSNumber *)componentExpression.constantValue;
if (![component isKindOfClass:[NSNumber class]]) {
return nil;
}
components.push_back(component.doubleValue / 255.0);
}
// Alpha
components.back() *= 255.0;
// macOS 10.12 Sierra and below uses calibrated RGB by default.
if ([NSColor redColor].colorSpaceName == NSCalibratedRGBColorSpace) {
return [NSColor colorWithCalibratedRed:components[0]
green:components[1]
blue:components[2]
alpha:components[3]];
}
// The Mapbox Style Specification does not specify a color space, but it is
// assumed to be sRGB for consistency with CSS.
return [NSColor colorWithColorSpace:[NSColorSpace sRGBColorSpace]
components:&components[0]
count:components.size()];
}
@end
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